Restructuring (Tables)

3 Months Ended

Mar. 31, 2019

Restructuring And Related Activities [Abstract]

Schedule of Change in Balance Sheet Position of Employee Related Restructuring Reserves for Continuing Operations

The table below summarizes the change in the balance sheet position of the employee related restructuring reserves for the continuing operations (dollars in millions). Restructuring costs other than employee related are immaterial for all periods presented.

	Three months ended
	March 31, 2019			March 31, 2018
Reserve at beginning of the period	$	33.4		$	39.6
Provision - charge		0.8			3.3
Provision - reversal		(0.1	)		—
Cash payments		(5.1	)		(2.9	)
Translation difference		(0.5	)		1.1
Reserve at end of the period	$	28.5		$	41.1